A result is expected to be announced from Plas Arthur, Llangefni, in the early hours of Friday morning.

For the last month they have been campaigning right across Anglesey, have argued with each other on social media and have taken part in four hustings meetings as well as one for radio and one for television.

The Electoral Commission is reminding voters of some simple steps they should take to make sure they can have their say in the poll.

Kay Jenkins, head of the Electoral Commission’s Wales Office says: “It is essential that people in Anglesey know there is an election taking place today and how to cast their vote so that they can have their say in deciding who represents the constituency at the National Assembly for Wales.”

“Check where you should vote.

“Details of your local polling station will be on your poll card.

“If you have not received it or are unsure of where to go call (01248) 752 817. Polling stations will be open until 10pm.

“Bring your poll card with you to the polling station, it may speed things.

“But don’t worry if you don’t have it, you can still vote without it!

“Follow the instructions on the ballot paper carefully.

“If you’re unsure of how to complete your ballot paper, a member of staff will be able to advise you.

“Pop your ballot paper in the ballot box and that’s it done.”

Mr Jones announced his departure in Junes after 26 years as an elected representative on the island.

In 1987 he was elected as the Ynys Môn MP, before going on to be elected as the island’s first Welsh Assembly Member in 1999.

In the last Assembly election in 2011, Mr Jones won with 9,960 votes, with Conservative Paul Williams second with 7,032, Labour’s Joe Lock on 6,307 and Liberal Democrat Rhys Taylor polling 759.

For more information on voting and the elections visit the website www.aboutmyvote.co.uk

The site also includes a virtual polling station which explains what to do when you go to a polling station.